Kitchen Knives in the Dishwasher – Yes or No?
Many high-quality knives are permanently damaged by the dishwasher. What exactly happens – and how to do it right.
Kitchen knives in the dishwasher – the short answer
No. Never. Even if the packaging says “dishwasher safe”.
That sounds strict, but once you understand what a dishwasher does to a knife blade, you’ll never do it again. As a knife maker from Solingen, I’ll explain exactly why.
What the dishwasher does to the blade
The detergent attacks the steel
Dishwasher tablets contain aggressive surfactants and often bleach as well. These substances attack even stainless steel. The result is microscopic spots of corrosion on the blade – invisible at first glance, but noticeable: the knife blunts faster and loses its shine.
The heat damages the handle
Heat is a serious problem, especially for knives with wooden handles – like our VOCUT knives with olive wood handles. Wood expands and contracts. After a few dishwasher cycles, cracks appear in the handle, the joint between blade and handle loosens, and the wood loses its natural surface. You can read more about caring for olive wood handles in our guide Kitchen knife care.
Other cutlery damages the edge
In the dishwasher, knives sit together with forks, spoons and other items. With every cycle they knock against each other – the delicate edge takes hits and scratches that destroy its sharpness.
What does “dishwasher safe” mean?
This label only means that the knife technically survives the cycle – it won’t break. It doesn’t mean it will be as sharp or look as good afterwards. Manufacturers use it to protect themselves legally; they’re not saying the dishwasher is good for the knife.
How to clean kitchen knives properly
Cleaning knives properly is simple and takes less than a minute:
- Rinse the knife under lukewarm water straight after use.
- Clean it with a few drops of washing-up liquid and a soft sponge.
- Dry it immediately with a cloth – never leave it wet.
- Store it in a suitable storage system.
That’s all. Treat your knives like this and you’ll enjoy them for years.
What if the knife has already been in the dishwasher?
Once or twice, a knife will usually cope. But if you put knives in the dishwasher regularly, you’ll notice the difference after a few months: the knife cuts worse, the blade tarnishes and the handle looks worn.
The good news: regular sharpening can at least partly restore the edge. You can read how in our guide How to sharpen kitchen knives.
If you own a forged VOCUT knife with a straight edge: you can use our free resharpening service even if the knife has gone blunt through improper care.
Conclusion
No good knife belongs in the dishwasher – whatever the packaging says. Washing by hand takes 30 seconds and keeps the knife sharp and looking good for many years.
You’ll find more knife care tips in our FAQ and in our overview article Kitchen knife care.
All VOCUT knives with olive wood handles – hand washing recommended, a lifetime of enjoyment in return.
Free resharpening service – for all forged VOCUT knives, even if the blade is already blunt.